In order to put Pinus genus plants resources to rational use, the chemical constituents of the turpentine of pinus kesiya have been studies. The turpentine of Pinus kesiya var. langbianensis (A. Chev.) Gaussen collected in Mojiang. yannan, was analysel qualitatively and quantitatively by means of GC/MS/DS.

Arbor sempervirens 15 m alta, trunco 30 cm diam. Folia a1terna, obovata ve1 obovato-lanceolata, 24--33 cm 1onga et 10--14 cm lata, coriacea, apice obtusa vel acuta, basi rotundata vel cuneata; nervis latera1ibus 14--24-jugis, costa subtus conspicue e]evata, flayo--tomentosa, margine serru1ata1 petio1is l cm longis, flavo-tomentosis.

From dried rhizome of Paris luquancnsis H. Li, a new species in Yunnan, two steroidal saponins pennogenin 3-O-α-L-arabinofuranosyl (1→4) -[α-L-rha- mnopyanosyl (1→2) ]-β-D-glucopyranoside and pennogenin 3-O-α-L-rhamnopy- anosyl (1→4) -α-L-rharnnopyranosyl (1→4) -[α-L-rhamnopranosyl- (1→2) ]-β- D-glucopyrtloside with daucosterol and α-ccdysone were isolated and identified, and the former have shown bettcr biological activity more latter.

Melasma arvense (Benth.) H.-M. (Scrophulariaceae) is a folk medicine in Yunnan. From the aqueous soluble fraction of its roots, melasmoside, a new monoterpenoid glucoside, has been obtained by chromatography on active charcoal. The structure of melasmoside was suggested as (1 ) by chemical reactions, spectroscopic analysis and X-ray analysis.

Capparis masaikai Levl. with a native name Mabinlang is distributed in Yunnan of China. Its mature seeds are used as chinese medicine and posgess sweet taste. The sweet principle has been established to be a basic protein, hetein named mabinlin- The protein is extracted from lipid-free seed;bowier with water at 45℃, and precipitated with 60% saturation of (NH4)2SO4 at pH7, and then precipitated with 2 volumes of acetone from the dialyzed aqueous solution of protein. The solid albumin preparation contains 16.5% of N, and its yield is about 7.2% on dry weight of decorticated seeds. It contains four protein components A,B, C, D wit relative mobility of 0.46, 0.51, 0.73 and 0.89 respectively in 15% pdlyactlamide gel electrophoresis (pH 4.3). Thdse trohipo- nents are separated from each other by using CM-sephadex c-50 column chro- matography and thydroxyapatite column chromatography. Only the component D tastes sweet.

The effect of four culture media on the germination of seeds of Cymbidium goeringii was studied. MS medium is superior to SH/2, VW and Knudson media. The peicentages of germination of seeds in different maturity were calcu- lated. About three months before the dehiscence of the capsule, the seeds are ready for germination. The effects of hormones on the differentiation of the rhizomes were studied. When the amount of NAA added to the medium is greater than that of BA, the rhizomes remain to form rhizomes; when BA is greater than NAA, the rhizomes differentiate to form buds. But, if the buds are transfered into the medium without hormone or with 10% coconut milk, the buds stop to grow and new rhizomes grow out from the basal portions of the buds.

The authors attempt through the analysis of floral composition to demonstrafe that the main forest vegetation in southern Yunnan is a part of tropical forest in Asia. However, the forest possesses obviously local characters because of the distribution have reached the limited range of the latitude and a1titude. The northern limit of the tropical forest and its floral composition distributed in Yunnan has been identified by the general distribution regularity through the analysis of fifty common plants and some pure tropical families and genera. And all the plants here were incorporated into four disfributional types. i. e.

Arbor decidua 10 m alta. Folia papyracea, clliptica vel obovato-elliptica, 4-10 cm Jonga, 2-5.5 cm lata, apice actlminata vel breviter acuminata, basi rotundatias vel paullo cordata, aliqanto obliqua, serrulata, supra virides glabra, stbtus dense tomentosa, nervis lateralibus tltrinseeus 10-14; petioli 1-2.2 cm longi, dense tomentosa. Infructescentia cylindrica 2- 3 cm longa, 1-1.3 cm dia., peduncalo 8-20 rm longo.

Arbor ca. 7cm alta,ramulis rufo-brunneis leviter tetragonis,dense ferrugineo-tementosis.Folia 9-16 cm longa,rhachide dense ferrugineo-tementosa instructa;foliolis 5-11-jusgis,subcoriacis,ellipticis vel oblongis,2.5-4cm longis,1.5-2cm latis,apice retusis,basi late cuneatis,inaequalibus supra viridibus subglabris,subtus flavo-viridibus,ad costam nervosque laterales dense fulvide tomentosia.

Hydrobryum Endlicher Gen. Pl .: 1375 1841, pro parte; Tulasne, Ann. Sci. Nat.,ser. 3, 11: l03 1849; Hook. f., Fl. Brit. Ind. 5:63 1886; Willis, Ann. Roy. Bot. Gard. Peradeniya 1:235 1902; Engl., Nat. Pflanzenfam. ed. 2, 18a: 52 1930; Ohwi, Fl. Jap.: 393 1965; C. D. K. Cook Water Pl. of World. 460, 1974. Euhydrobryum Koidzuofi, in Doi, Fl. Satsum. 2: 98 1931.

Herba erecta vel suffrutex. Caulis obtuse quadrangulatus, internodiis multis foliis brevioribus, nodiis tumidis. Folia opposita, plus minusve inaequalia per paria, petiolata, pinnatinervia. Cyma 3- 5, singula vel bina in axillis foliorum supe- riorum inserta, longipedunculata.

Cheilanthes farinosa auct.:H.Ito in FI.East.Himal.1：460（1966）p.p.non Kaulf.Species e turma A.pseudofarinosae Ching et S.K.Wu，differt stipite quamlamina 3-plo longioro，usque ad 3o cm longo，lamina deltoideo－ovata，suotus niveo－alba，textura in sicco rigida coriacea，indusiis margine subintegris vel paulo dentatis．

Tubera anguste obconica, circ. 3 cm longa, 1 cm crassa. Caules circ. 80 cm alti, inferne piloselli, superne cum petiolis densiuscule retrorso-puberuli. Folia superiora breviter pctiolata; laminae herbaceae vel tenuiter papyraceae, pentagonae, cire. 7 cm longae, 9 cm latae, basi aperte cordatae, ad 8 mm supra basin tripa- rtitae,partitione mediana rhomboidea apice longe acuminata pinnatim lobata, lobis triangularibus pauce acuteque dentatis, partitionibus lateralibus oblique flabellatis inaequaliter 2-partitis, supra adpresse pilosellae, subtus secus nervos pilosellae.

Descr. Fl. add. Inflorescentiae breves racemosae terminales, 2- 3-florae, vel solitariae; bractea major, conchiformis plicata, rhomboideo-ovata, 1.3 cm longa, 1.1 cm lata, apice rotundata, basi attenuata, chartacea, rubra vel viresccnfis, glabra, nervis protninentibus; bracteola 2, lanceolata, 4- 6 mm longa, 2 mm lata, acuta, glanduloso-mucronulata, nervis reticu latis prominentibus, ad marginem sparse pilosis; pedicelli brevissimi 1 mm longi. Receptalum obconicum., 2.5 mm longum; calycis segmenta ovato-deltoidea, 1.5 mm longa, apice obttlsa, puberula, rnarginem dense puberula; corolla cylindrica alba vel viridis.

Durazz. in Mag. Tosc. 3: 11. 1772; Benth. et Hook. f. Gen. Pl. I:596, 1865; Benth. in Trans. Linn. Soc. London. 30:557, 18753 Taubert in Engl. et Prantl. Nat. Pflanzenf. 3 (3 ): 106, 1894j Hutchinson, Gen. Fl. Pl. I:294, 1964: I. Nie1sen in Adansonia, ser. 2, 19(2 ):204, 1979.--Serialbizzia Kosterm. in Btill. Org. Sci. Res. Indonesia 20(11): 15, 1954 .--Cylindrokelupha Kosterm. l.c. 20(11):20, 1954; T. L. Wu in Acta Phytotax. Sinica 19:214, 1981.-- Paralbizzia Kosterm. l. c. 20(11):23, 1954.--Archidendron (non Mueller) I. Nielsen in Adansonia,ser.